Leguminosae, Cassia is an evergreen tree. Also known as Thai mountain lentils, Bombay ebony, Bombay rosewood. It is named because of the hard material and the difficulty of entering the knife and axe. This genus is about 500 species, widely distributed in tropical, subtropical and temperate regions, with trees, shrubs and herbs. Tiedao wood is one of the most economically valuable tree species in this genus. Tiedao wood is evergreen all the year round, with beautiful leaves and flowers, long flowering period, less diseases and insect pests, and can also be used as street trees and shelterbelt species. Bark, pod containing tannin, can be extracted tannin extract. The branches can be stocked with lac insects to produce lac. Strong, green branches and leaves, is a low-maintenance excellent landscape trees, street trees, shade trees, forest trees. Gardens, campuses, parks, amusement areas, temples, etc., are used for single planting, column planting, and group planting. Flowering can lure butterflies.